Study of the reactions of hexanitrocobaltates(III) with amino acids. II. Determination of the configuration of dinitrobis(glycinato)cobaltate(III) ions

In a previously published paper1 we have undertaken a study of the reactions of hexanitrocobaltate(III) with amino acids. The first reaction we studied was that of glycine with potassium and sodium hexanitrocobaltate( III). In such a way the synthesis of a new class of complex compounds, dinitrobis (glycinato)- cobaltates(III) (MI[Co(H2NCH2COO)2(N02)2]), was given

Reactions with lead tetraacetate-IV. Oxidation of saturated aliphatic alcohols-II; Alcohols of low molecular weight

The action of lead tetraacetate on ethanol, 1-propanol, 2-propanol and 2-butanol has been studied under various experimental conditions, and it was found that the tetravalent lead compound reacts with alcohols in ways not so far observed. The possible reaction schemes are discussed in terms of homolytic and heterolytic cleavage of the intermediate alkoxy lead acetate complexes

The conversion of unbranched primary alkyl and arylalkyl amines to nitriles by means of lead tetraacetate

The only amino compounds oxidized so far with lead tetroacetate were primary aromatic amines, which gave mainly the corresponding azo compounds(1), and some tertiary aryldialkyl amines, which in glacial acetic acid in the presence of acetic acid anhydride underwent oxidative dealkylation with the formation of acetylated secondary amines (2)

Lead tetraacetate oxidation of saturated aliphatic alcohols-IV. The formation of six-membered cyclic ethers

The lead tetraacetate oxidation of saturated aliphatic alcohols, with structures which do not permit 1,5-cyclization, gave tetrahydropyran derivatives in yields not exceeding 16%. The formation of a small amount of the rearranged ether, 2-ethyl-2-methyltetrahydrofuran, from 4,4-dimethyl-1-pentanol indicates that the cyclization reaction proceeds via an intermediate with carbonium ion character

Reactions with lead tetraacetate-I. Oxidation of saturated aliphatic alcohols part 1

When oxidized with lead tetraacetate 1-heptanol and 1-octanol undergo cyclization to give as major products the corresponding 2-alkyltetrahydrofurans, accompanied by a small amount of the isomeric tetrahydropyran derivatives. Secondary aliphatic alcohols, under similar conditions, are converted to a mixture of cis and trans 2,5-dialkyltetrahydrofurans

Opening of steroid ring a by means of lead tetraacetate

The lead tetraacetate oxidation of cholestan-1β-ol and cholestan-1α-ol in benzene solution did not afford cyclic ethers but resulted, in major part, in the opening of ring A with formation of 1,10-seco-aldehydes. In addition, cholestane, cholest-1-ene and cholestan-1-one were also obtained

Reactions with lead tetraacetate. I. Oxidation of saturated aliphatic alcohols. Part 1

It was recently shown that various steroid alcohols could react with lead tetraacetate in non-polar solvents to give tetrahydrofuran and tetrahydropyran derivatives. cyclization occurring when the position of and the distance between the reacting hydroxyl group and the 8 - or d -methyl, methylene or methine group were favourable to ring closure